// 计算经纬度范围 lat是已知点的纬度,lon是已知点的经度, raidus 半径(米)
public static double[] getPositionArray(double lat, double lon, int raidus) {
Calendar calendar = Calendar.getInstance();
int hour2 = calendar.get(Calendar.HOUR_OF_DAY);
Double latitude = lat;
Double longitude = lon;
Double degree = (24901 * 1609) / 360.0;
double raidusMile = raidus;
Double dpmLat = 1 / degree;
Double radiusLat = dpmLat * raidusMile;
Double minLat = latitude - radiusLat;
Double maxLat = latitude + radiusLat;
Double mpdLng = degree * Math.cos(latitude * (Math.PI / 180));
Double dpmLng = 1 / mpdLng;
Double radiusLng = dpmLng * raidusMile;
Double minLng = longitude - radiusLng;
Double maxLng = longitude + radiusLng;
return new double[] { minLat, minLng, maxLat, maxLng };
}
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